I like lucene query string syntax (https://lucene.apache.org/core/8_10_1/queryparser/org/apache/lucene/queryparser/classic/package-summary.html#package.description). I think it is more human-readable. So, please add the range operator to it and if it's possible, add other ones like NOT, regex, boosting, proximity and fuzzy.
If it's hard, please focus on range and NOT